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Void structures in olivine grains in thermally metamorphosed Antarctic carbonaceous chondrite B-7904
https://doi.org/10.15094/00004638
https://doi.org/10.15094/00004638431ac7c9-26cb-4466-9a91-fdbe096191ca
名前 / ファイル | ライセンス | アクション |
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KJ00000036444 (630.3 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1994-03-01 | |||||
タイトル | ||||||
タイトル | Void structures in olivine grains in thermally metamorphosed Antarctic carbonaceous chondrite B-7904 | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00004638 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Akai, Junji
× Akai, Junji |
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著者所属(英) | ||||||
en | ||||||
Department of Geology and Mineralogy, Faculty of Science, Niigata University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The Antarctic carbonaceous chondrite Belgica-7904 suffered thermal metamorphism. The main constituent phyllosilicates of this meteorite are serpentine and/or saponite, which display transformation from serpentine to olivine or from saponite to enstatite in various degrees (J. AKAI : Geochim. Cosmochim. Acta, 52,1593,1988; Proc. NIPR Symp. Antarct. Meteorites, 3,55,1990). Detailed Transmission Electron Microscopy (TEM) observation of this meteorite reveals characteristic void structures, which are found mainly in olivine grains. The voids or bubble-like structures are very frequently found in some grains. The shapes of the voids are varied. Some are irregular and some are crystallographically controlled. Five possible mechanisms for their origin are : 1) thermal metamorphism, 2) irradiation by high energy particles in the solar nebula, 3) shock effects, 4) sample preparation artifacts and 5) alteration process. Among five or more possible mechanisms, the voids mostly likely formed during thermal metamorphism or as a result of irradiation damages by high energy particles in the early solar system. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10784627 | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Antarctic Meteorites 巻 7, p. 94-100, 発行日 1994-03 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |